Re: Cathodic reaction hydrogen evolution on RDE
- From: "DrHuang.com" <DrHuang@xxxxxxxxxxx>
- Date: Fri, 24 Nov 2006 21:14:45 +1100
6.1.5.4 Effect of Electrode Rotating Speed
For the rotating electrodes, current increases as the electrode rotating
speed increases, and the limit current increases linearly with square root
of the electrode rotating speed, which agree with theoretical equations.
When the ratio of rotating speed to scan rate, w/v < 1, the shape is peak.
When high-speed w/v > 103, the shape becomes S-shape wave. If you set the
rotation speed to 0, the current should become one without rotation.
Please read Electrochemist manual in the web site www.electrochemist.com
for detail.
"Dr noone" <writer9000@xxxxxxxxx> wrote in message
news:cjh0a2tppob8g7h5fd0libij9clgbr8v2c@xxxxxxxxxx
Can you tell me if changes in electrode rotation rate have any
influence on cathodic reaction - evolution of hydrogen? Is it possible
that with increasing the rotation rate of disc electrode cathodic
current density become higher? The working electrode is Al disc
electrode in deaerated neutral NaCl medium, where cathodic reaction is
hydrogen evolution which takes place slowly by dissociations of water
molecules. Will the situation be different if the solution is acidic,
like HCl instead of neutral NaCl solution? Can you also tell me where
I can find explanations in theory about my questions (some easily
accessible book, scientific papers, or free web site)?
.
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